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ID = 52195
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Gas Triode   Detector 
  <1925 very rare. ***
Identical to C-1 = C-I = A_Ideezet = LLV_Ideezet = C-I_Ideezet

Base Edison medium E14 = 14 mm, mignon Base on each end.
Filament Vf 4 Volts / If 0.5 Ampere / Direct / Battery =
Description The designation of this tube was C 1 in 1920 and C I in 1921, 1922 and 1923. 
Dimensions (WHD)
incl. pins / tip
24 x 115 x 22 mm / 0.94 x 4.53 x 0.87 inch
Weight 21 g / 0.74 oz
Information source - - Manufacturers Literature   H402 August 1920
Peter den Boer

C-1: own collection
Peter den Boer

from Just Qvigstad

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